IgG1+ ovalbumin-specific B-cell transnuclear mice show class switch recombination in rare allelically included B cells
摘要：
We used somatic cell nuclear transfer (SCNT) to generate a mouse from the nucleus of an IgG1(+) ovalbumin-specific B cell. The resulting OBI mice show generally normal B-cell development, with elevated percentages of marginal zone B cells and a reduction in B-1 B cells. Whereas OBI RAG1(-/-) mice have exclusively IgG1 anti-ovalbumin in their serum, OBI mice show elevated levels of anti-ovalbumin of nearly all isotypes 3' of the γ1 constant region in the IgH locus, indicating that class switch recombination (CSR) occurs in the absence of immunization with ovalbumin. This CSR is associated with the presence of IgM(+)IgG1(+) double producer B cells that represent <1% of total B cells, accumulate in the peritoneal cavity, and account for near-normal levels of serum IgM and IgG3.
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关键词：
Animals Mice, Inbred BALB C Mice B-Lymphocytes Cell Nucleus Immunoglobulin G Immunoglobulin M Crosses, Genetic Recombination, Genetic Alleles
DOI：
10.1073/pnas.1210273109
被引量：
年份：
2012
国家科技图书文献中心
(权威机构)
掌桥科研
万方医学
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